B&W 800 Diamond

I don’t think so but I’m not really sure 

Just wondering if these use ferro fluid?

this work?

there are many 'improved' variations, you need to get all the specifics

You can write any parts supplier even if they do not list your specific modeel, and ask if they have parts/repair service, and perhaps they can tell you how to ascertain exactly which tweeter you have.

You ordered a replacement, what specifics, take measurements/photos before you install it, that should help with your repair search.

https://www.aliexpress.us/item/2251832801902253.html?src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=19623912707&albag=&trgt=&crea=en2251832801902253&netw=x&device=c&albpg=&albpd=en2251832801902253&gad_source=1&gclid=CjwKCAiAlJKuBhAdEiwAnZb7ldeoooRinGADVrSjX7T7VyzNeo1rWiogcqeqSjHZlZzCfWkughs6WhoCtJIQAvD_BwE&gclsrc=aw.ds&aff_fcid=9964bb3242094459af3a55fb00d8fb9d-1707403937021-07316-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=9964bb3242094459af3a55fb00d8fb9d-1707403937021-07316-UneMJZVf&terminal_id=9e131df15aa34acea8ffefb4ac5e99e0&afSmartRedirect=y&gatewayAdapt=glo2usa

NOTE: If you receive a repaired one, I would put it in place of the replacement one, verify it works, not just leave it in a box and find out later something was amiss. I had a pair of rare 15" woofer cone/coil kitsl replaced by a pro, I installed them, 1 voice coil rubbed very slightly, back it went.